That's because they're using the FBI as a scapegoat for the PMC forces active in the area. The mercenaries certainly had FBI level clearance. I don't stand behind this source. Couldn't find the one I saw a few weeks ago where local citizens were complaining about being harassed by said mercenaries. Also beware of ads.

https://www.intellihub.com/reports-armed-drone-over-burns-oregon-foreign-mercenaries-posing-fbi/